[issue29262] Provide a way to check for *real* typing.Union instances

[Guido van Rossum]

Guido van Rossum added the comment:

Posting to python-dev would probably cause more friction than a PR for the
PEPs repo. But maybe the best way to do this is to use a third party module
with a proposed API? E.g. typing_inspect. We could then iterate quickly on
the design and implementation there, and we could commit to keeping it in
sync with changes to typing.py, so flying sheep's package could depend on
it.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29262>
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